uboot-imx

gplugD: Fix for error:MACH_TYPE_SHEEVAD undeclared

This patch fix the build failure (error: 'MACH_TYPE_SHEEVAD' undeclared
(first use in this function)) for gplugD due to recent sync of
mach-types.h with its linux original.

Signed-off-by: Ajay Bhargav <ajay.bhargav@einfochips.com>